Factorise:x4 – y4 – InterviewSolution

1.	Factorise:x4 – y4
Answer» x⁴ – y⁴ = (x²)² – (y²)² Identity a² – b² = (a + b)(a – b) = (x² + y²)(x² – y²) = (x²+ y²)(x + y)(x – y)

Factorise:x4 – y4

Answer»

x⁴ – y⁴ = (x²)² – (y²)²

Identity a² – b² = (a + b)(a – b)

= (x² + y²)(x² – y²)

= (x²+ y²)(x + y)(x – y)